Computing device.



P. F. W. C. KRIPPENDORF. COMPUTING DEVICE1 APPLICATION FILED APR.1. 1908.

29 l 2 E Patented. June 8, 19M).

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PAUL F. W. C. KRIPPENDORF, 0F LYNN, MASSACHUSETTS, ASSIGNOB TO KBIPPENDORF KALCULATOR COMPANY, OF PORTLAND, MAINE, A. CORPORATION OF MAINE.

` COMPUTING DEVICE.

Specification of Letters Patent.

Patented J une 8, 1915.

Appucauon mea April 1, isos. sum1 no. 424,552.

T0 all whom it may concern:

rENDoRr, a citizen of the United States, and a resident of Lynn, in the county of Essex and State of Massachusetts-have invented an Improvement in Computing Devices, of which Vthe following description, in connection with the accompanying drawing, is a speciication, like letters on the drawing representinglike parts. I

This invention relates toa device for automatically computing or calculating the supericial area required in different materials to provide for the cutting of a plurality of irregular shaped parts therefrom.

It is particularly designed for use in the manufacture of shoes where it is desired to ascertain the superficial area of any kind or quality of leather which will be required t0 cut therefrom the whole or any part of` a shoe. The device is designed when applied to any particular part or parts of a shoe of any style or shape to calculate and indicate automatically the superficial area of leather required to cut out the part or parts in question, including the allowance for wastage due to the particular kind of leather, size of skins, etc., as well as, if desired, a fixed allowance determined by the manufacturer.

The deviceof this invention is particularly designed for use in connection with the calculatingl device shown and described in application No. 419,650-, filed-'..March 7th,

1908, and' its object when so used with such device is to furnish accurately directly and Without the necessity for supplementary calculations, the data required for the table,

' such as set forth in said application. A

table such as that referred to shows the amount of leather which it is desired to allow, or in other words, the total superficial a'rea required for the cutting of the Whole or any part or group of parts of any style of shoe of the standard size 4% C. It is obvious that since-this table forms the basis of the subsequent calculations of 'the amount of leather required to cut large quantities of shoes'in the factory, that to secure the best results it must be as accurate as possible. @ne of the factors upon which the table is based is the actual size of the parts of the particular style of shoe. This invention renders it possible to secure accurate results by the employment of the device herein disclosed which measures lthe actual area o/the parts of the shoe, and automatically makes and indicates the required allowances.

The invention will appear more fully from the accompanying description and drawings and will be more particularly point-ed out in the claims.

The drawings represent the preferred form of the invention.

Figure 1 is a top plan view of the devic shown i'n operative position.. l Fig. 2 is a cross-section taken through the line Fig. 3 is a top. plan view of the circular scale of the device.

The device is based on the principle of the polar planimeter and should be ont a size suitable for easily passing around the periphery of any size of' shoe part. A

The device comprises a radius arm A, the 75 precise length of which is immaterial, and which is arranged to` move about a iixed pivot B. For that pin-pose` the pivot B may be mounted on a weight C', which can be set at any point on the table on which the 30. device is used.

The `device furthe-rcomprses the tracing arm D. provided at one end with a tracing point D2, and pivoted at its opposite end at D* to the radius arm A. This pivot Ds is35 mounted in a slide D4 which may be set at any position along the tracing arm D and clamped by means of the set-screw D so that the effective length of the tracing arm, that is, the length 'from the tracingpointi 90 D2 to the pivot D3; maybe varied.

The device. further comprises the wheel E, mounted on the transverse shaft E". The shaft E2'` is sustained in position. by having its conical orrounded' ends seated in 9,5 depressions inthe adjustable journal screws E3, mounted in anl ann-ular'bearing Block E.

The bearing block E is sustained in a circular enlargement F of the tracing arm D, and in the constructiony shown the bearing block E" and enlargement F have corresponding conicalf walls so as to secure .a close fit without lost motion, A cap-plate G is screwed on to the upper surface of the bearing-block E and extends over and slides upon the enlargement F, and' is provided with oppositely arranged spring ii'xgersv G2, pointed at their ends to take. into the holes 0f' the scal'e'S shown in Fig, t

Et willi thus he seen that by raising the n@ spring lingers G2 and turning the plate G the bearing block E4 may be set at any position angularly with respectto the enlargement F of the tracing arm, and that thereupon the axis of rotation of the wheel E Will take any desired angle' with respect to the vertical plane of the axis of the tracing arm. The parts are so constructed that the vertical axis of the lwheel E is on the center of Vrotation of the bearing block E4', and in the vertical plane of the axis of the tracing arm or the vertical plane passing through the tracing point D2 and the pivot D3 it being understood that the device is operating on a horizontal plane.

An indicator H of any suitable type, such for example as the ordinary cyclometer type, is carried by the bearing block E4 and operated by the rotation of the wheel E, so as to indicate in figures the result of the rotation yof the wheel E.

Near the end of the tracing arm D a pin D6 is mounted, and is of such a length asto rest upon the article being measured and prevent the tracing point from scratching the same.

When the wheel E of the device is set at an angle of 90, or at right angles to the axis of the tracing arm, and the tracing point D2 is moved entirely around the periphery of an irregular shaped ligure, such as a shoe part illustrated in Fig. 1, the exact area of the figure or shoe part will, under the well known principle of the polar plani- ,meter, be equal to the length of the tracing arm multiplied by the distance rolled over by the periphery of the wheel. Hence, the indicator H for a given diameter of wheel, may readily be arranged to indicate in figures the exact area. in the manufacture of slices, however, it is desired to ascertain the superficial area which would be required to cut therefrom the part or parts of a shoe which obviously will be greater than the exact area of the part or parts to be. cut,

and will vary according to the particular kind of leather, the size of the skins, etc.,

. to be used. The relations between these latter factors is, however, well known as the result of wide experience, and can be expressed in figures. For example, if it requires a certain amount of leather to cut certain parts of a shoe from calf it is known what percentage of that amount will be required to cut the same parts from patent leather. Again, if a certain amount of leather is requiredto cut the parts of a shoe from an eight foot skin, it is known what percentage of that amount will be required to cut the same parts from a six foot skin. This ratio, as a result of many experiments, and a wide experience, may be indicated as follows bfor the factors here set forth, but it is obvious that other factors may enter into the matter and may be given a number to correspond to their eect. The table is illustrative merely.

Kid 8 ft. skin Patent colt oo-q'm'cnieoomi-o coooooooo Russia calf sharewares@ OQO of the tracing arm be changed the indicator will show a fraction, proper or improper, of the actual area of the part being measured. The distance rolled over by the wheel, being one of the factors which goes to make up the area, will vary with a change of the angular position of the wheel directly as the cosine of the angle which the wheel makes with the axis of the tracing arm. lt follows, therefore, that if the scale S be graduated by angles whose natural cosines are the ratios existing between the different kinds of leather, different sizes of skins, ctc., or the ratios existing between the numbers such as set forth in the foregoing table, that the wheel E when positioned according to the said graduations will multiply or divide the actual area of the part being measured accordingly. For convenience these graduations are arranged 'as shown in Fig. 3,the odd numbers appearing on one quadrant, and the even numbers on the diagonally opposite quadrant, and the indicator H is arranged to show the actual area of the part being measured when the wheel E is set to the graduation 2.00. It is also apparent that by varying the effective length of thc tracing armD the result shown by the indicator will be varied in proportion tu the effective length of the tracing arm. lt is desirable to have such a variation of the total result show that any manufacturer may rincrease or diminish the allowance which he desires to make by a iixcd percentage. For example, if it is desired to improve the quality of the shoes being manufactured the amount of leather allowed to the cutters may be increased, and correspondingly when it is desired to diminish the cost of production the amount of leather may be decreased. Any such increases or decreases will, it will be observed, be independent of the kind, quality of leather, or size of skins, etc., being used. The tracing arm, accordingly, is marked off as shown arcaica j p at T in percentages. The construction isv such that when the slide Di is at 1.007the scale H -Will show the area as modified by the allowances of the scale S. This area will increase or decrease accordingly as the slide -D is shifted to one of the other graduations on the scale T.

The operation of the device Will now be apparent, and may best be illustrated by a concrete example. liet us assume that the manufacturer desires to take up the manuxfacture of a particular style of shoe. He determines first the kind of leather, the size of skin, etc., Which he is to use, and after consulting the table hereinbefore set forth sets the pointer G2 of the device at the corresponding graduation on the scale S. 'if he desires to maire no change in the allowance, which is just sudicient for cutting the parts, he sets the slide D4 at 1.00 on the scale T. li, however, he desires to increase the allowance slightly, say live per cent., to allow or" the production ci a high grade shoe, he sets the slide at "L05 on the scale T. He then taires the patterns ci the standard size l C of the did'erent parte which are to be cut, places them upon 'the table singly or in groups, as desired, and runs the tracer D2 around the periphery thereof. When this is completed the indicator H shows in iigures the total superficial area required with all allowances for cutting the part or parts in question. By repeating this operation the igures are 'obtained for making a table such as shown in the aforesaid application Serial No. s195350.

Having described my invention, what l claim as nevi and desire to secure by Letters Patent, is:

l. A measuring and calculating device or" the character described, comprising a tracing arm provided with a tracingpoint, a radius arm pivot-ed to the tracing arm, a

wheel mounted on the tracing arm to rotate about an axis in the vertical plane oi"a the axis of said arm. and .means to allow ein: the adjustment or said Wheel to vary the angular position oits axis of rotation with respect to said plane.

2. A measuring and calculating device of the character described, comprising a tracing arm provided with a tracing point, a radius arm pivoted tothe tracing arm, a wheel mounted on 'the tracing arm to rotate about an axis in the vertical plane of the axis of said arm, and means to allow of the adjustment of said Wheel to vary the angular position of its axis of rotation with respect to said plane, and an indicator operatively connected with said Wheel and operated thereby to indicate the desired area.

3. A. measuring and calculating device of the character described, comprising a tracing arm provided with a tracing point, a radius arm pivoted to the tracing arm, a

wheel mounted on the tracing armto rotate about an axis in the vertical plane of the axis of said arm, means to allow of the adjustment of said Wheel to vary the angular position of its axis of rotation with respect to said plane, and graduations on the tracing arm to indicate the angular position of the Wheel.

4. A measuring and calculating device of the character described, comprising va tracing arm provided with a tracing point, a radius arm pivoted to the tracing arm, a Wheel mounted on the tracing arm to rotate about an axis in the vertical plane oi the axis of said arm, means to allow of the adjustment of said Wheel to vary the angular position of its axis of rotation with respect to said plane, and graduations on the trac- -ing arm to indicate the angular position or" the Wheel, and an indicator' operatively connected with said Wheel and voperated thereby to indicate the desired area.

5. d measuring instrument of the character described, comprising a tracing arm provided With a tracing point, a radius arm pivoted to the tracing arm, connecting means permitting the pivotal point of said arms to be adjusted to or 'from the tracing point to varyithe effective length of the tracing arm, and indicating means adjustable to determine a predetermined -traction ci the area bounded in the movement o the tracing arm.

6. A measuring and calculating device of the character described, comprising a tracing arm provided with a tracing point, a radius arm pivoted to the tracing arm, means whereby the pivotal point oi' the said arms may be adjusted to or from the tracing point to vary theeffective length of the tracing' arm, a wheel mounted on the tracing arm to rotate about an axis in the vertical plane oli' the axis of said arm, and means to allow of the adjustment of said Wheel to vary the angular position of its axis of rotation ivith respect to said plane.

Y. A measuring and calculating device of the character described, comprising a tracing arm provided with a tracing point, a radius arm pivoted to the tracing arm, means whereby the pivotal point or the said arms may be adjusted to or from the tracing point to vary the effective length ci the tracing arm, a Wheel mounted on the trafcing arm to rotate about an axis in the 'vertical plane of the axis of said arm, and means to allow of the adjustment of said Wheel to vary the angular position of its axis of rotation with respect to said plan, and an indicator operatively connected With said Wheel and operated to indicate the desired area.

SiA A device ior measuring they area ot shoe parts and calculating the' amount of leather requiredfor cuttinff the same, comprising a tracing arm provided with a tracicc yto said'plane, graduations on -the tracing arm to indicate the angular position of the wheel'and thus the kind of leather to be used, and an indicator operatively connected with said wheel and operated thereby to indicate-the desired area. j v

SQA device for measuring the area of shoe parts and calculating the amount of material required for cutting, a tracing arm provided with a tracing point, a radius arm pivoted to the tracing arm, a Wheel mounted on the tracing arm to rotate about an axis in the vertical plane of the axis of said arm and having its axis of rotation adjustable angularly with respect to said plane, angular graduations on the tracing arm, the natural cosines of which lcorrespond to the ratios existing between the vsuperficial area of different kinds of leather required to cut the same given shoe parts, and an indicator operatively connected with said wheel and operated thereby to indicate the desired arca.

10. A device for'measuring the area of shoe parts and calculating the amount of leather required for cutting the same, comprising a tracing arm provided with a tracing point, a radiusarm pivoted to the tracing arm, graduations ou the tracing arm nations, a wheel mounted on the vtracing arm to rotate about an axis in the vertical plane of the axis of said arm, and having its axis of rotation adjustable angularly with respect to said plane, graduations on the -tracing arm to indicate the angular position of lthe wheel and thus the kind of leather to be used.

11. A device for measuring the area of shoe yparts and calculating the amount of material required for cutting, a tracing arm provided with a tracing point, a radius arm pivoted to the tracing arm, a wheel mounted on the tracing arm to rotate about an axis in the vertical plane of the axis of said arm and having its axis of rotation adjustable angularly with respect to said plane, angular graduations on the tracing arm, the natural cosines of which .correspond to the ratios existin between the superficial area ot' diii'erent kinds of leather required to cut the same given shoe parts.

12. A measuring instrument comprising a polar planimeter including a tracing arm` and a wheel associated therewith, the wheel having an axis which is arranged for angular adjustment with relation to the tracing arm.

13. A measuring instrument comprising a polar planimeter including a tracing arm and a wheel, the tracing arm carrying an angularly adjustable member in which the wheel is journaled.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

PAUL F. W., C. KRlPPENDORFs Witnesses:

EMILY C. Honens, MABEL PARTELOW. 

